The IRS says some Americans will not see their full economic impact payment until 2021.

Trista Jones Manigault is an Ohio mother of three and longtime business owner. She said her stimulus check was $500 less than she was expecting.

"You're blindsided by the fact that the check was short," she said. "I have checked with a few other women that I know that also would be getting money for their kids. They also were short."

Jones Manigault received her stimulus check this week. She filed her 2019 taxes with the single head of household status and claimed her son Memphis, who is in the second grade, as a dependent.

She should have received a $1,700 economic impact payment, $1,200 for herself and $500 for Memphis. Instead, she received a check for $1,200.

"There's no explanation of why they didn't give it," she said. "I'm in shock that they wouldn't communicate that before it went through."

In an updated post on the IRS website, the agency wrote, "If you did not receive the full amount to which you believe you are entitled, you will be able to claim the additional amount when you file your 2020 tax return. This is particularly important for individuals who may be entitled to the additional $500 per qualifying child dependent payments."

That means people like Jones Manigault likely will not receive the additional money owed until next year.

Her store has been closed since early March, and although she plans to reopen May 12, the future is uncertain.